尖晶石载体型铁基载氧体甲烷晶格氧重整特性  

Methane reforming performance with lattice oxygen of iron-based oxygen carrier supported by spinel

作　　者：胡骏 于海龙 王海博 王超前 HU Jun;YU Hailong;WANG Haibo;WANG Chaoqian(School of Petroleum and Natural Gas Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学石油与天然气工程学院,江苏常州213164

出　　处：《常州大学学报(自然科学版)》2025年第2期29-35,共7页Journal of Changzhou University:Natural Science Edition

摘　　要：以MgAl_(2)O_(4)尖晶石为载体,采用共沉淀法制备了Fe_(2)O_(3)质量分数为20%~50%的Fe_(2)O_(3)/MgAl_(2)O_(4)。比较了Fe_(2)O_(3)质量分数对Fe_(2)O_(3)/MgAl_(2)O_(4)载氧体甲烷反应过程的影响,基于密度泛函理论方法探究了甲烷晶格氧重整过程的关键反应。结果表明,随着Fe_(2)O_(3)质量分数的增加,完全氧化与部分氧化的过渡阶段持续时间变长,导致甲烷转化率明显降低;甲烷裂解在FeO表面难发生,Fe_(3)O_(4)表面晶格氧活性最低;FeO是甲烷转化率最低阶段的主要物相。证明相比于晶格氧释放,甲烷裂解是关键步骤。In this paper,MgAl_(2)O_(4)spinel was used as support,and Fe_(2)O_(3)/MgAl_(2)O_(4)with Fe_(2)O_(3)mass fraction of 20%—50%was prepared through co-precipitation method.The effect of Fe_(2)O_(3)content on the methane reforming performance was studied,and the key reactions were explored by calculation based on density functional theory.With the increase of Fe_(2)O_(3)content,the duration of the transition stage between complete oxidation and partial oxidation extended,leading to a significant decrease in methane conversion rate.Methane cracking was difficult to occur on the surface of FeO,and the surface lattice oxygen activity of Fe_(3)O_(4)was the lowest.FeO was found as the main phase at the stage of the lowest methane conversion rate,proving the methane cracking reaction is the key step comparing with lattice oxygen releasing.

关 键 词：铁基载氧体 尖晶石 甲烷 重整 

分 类 号：TQ116.2[化学工程—无机化工]